Dual mode cavity stabilized oscillator

Oscillators – Solid state active element oscillator – Significant distributed parameter resonator

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

331 96, 331177R, 333212, H03B 500

Patent

active

045409552

ABSTRACT:
A stable electromagnetic oscillator (30) comprises an amplifying element (3) in feedback association with a dual mode resonant cavity (12) that provides a double pole bandpass filter function. Two orthogonal modes (1 and 2) of electromagnetic energy resonate within the cavity (12). An output from the amplifying element (3) excitationally couples into the first mode (1), while the second mode (2) couples into the input of the amplifying element (3). The output (8) of the oscillator (30) is obtained from the first mode (1). Optional injection lock can be used for greater stability by means of coupling a stable a.c. reference (9) into the cavity (12) in alignment with the second mode (2). Optional electronic frequency tuning comprises a phase or frequency comparator (11) and a reference a.c. source (13), producing a d.c. feedback signal fed to varactor diodes (10). Coupling ports (4, 5, 6, 7) of the cavity (12) can be, e.g., irises, capacitive probes, coaxial probes, or any combination thereof. The electrical field associated with each port (4, 5, 6, 7) is aligned with the electrical field of the mode (1 or 2) coupled thereby. A dielectric resonator (20) can be positioned within the cavity (12) to allow for physical shrinking of the cavity (12) while maintaining the electromagnetic characteristics of the cavity (12).

REFERENCES:
patent: 3699475 (1972-10-01), Rogers
patent: 4060779 (1977-11-01), Atia et al.
patent: 4079341 (1978-03-01), Linn et al.
patent: 4096453 (1978-06-01), Rogers
patent: 4307352 (1981-12-01), Shinkawa et al.
patent: 4321560 (1982-03-01), Nishikawa et al.
patent: 4325035 (1982-04-01), Nishikawa et al.
patent: 4453146 (1984-06-01), Fiedziuszko
Ishihara et al., "A Highly Stabilized GaAs FET Oscillator Using a Dielectric Resonator Feedback Circuit in 9-14 GHz", IEEE Transactions on Microwave Theory and Techniques, vol. MTT-28, No. 8, Aug. 1980, pp. 817-824.
Mori et al., "A Highly Stabilized GaAs FET Oscillator Using a Dielectric Resonator Feedback Circuit in 9-14 GHz", Technology Growth for the 80's: 1980 IEEE MTT-S, International Microwave Symposium Digest, May 28-30, 1980, pp. 376-378.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Dual mode cavity stabilized oscillator does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Dual mode cavity stabilized oscillator, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Dual mode cavity stabilized oscillator will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-1431117

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.